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Focusing and defocusing of tropical cyclone generated waves by ocean current refraction
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  • Rui Sun,
  • Ana Beatriz Villas Bôas,
  • Aneesh Subramanian,
  • Bruce Cornuelle,
  • Matthew R. Mazloff,
  • Arthur J Miller,
  • Sabique Langodan,
  • Ibrahim Hoteit
Rui Sun
Scripps Institution of Oceanography, Scripps Institution of Oceanography

Corresponding Author:[email protected]

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Ana Beatriz Villas Bôas
Scripps Institution of Oceanography, Scripps Institution of Oceanography
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Aneesh Subramanian
University of Colorado, University of Colorado
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Bruce Cornuelle
Scripps Institution of Oceanography, University of California, Scripps Institution of Oceanography, University of California
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Matthew R. Mazloff
UCSD, UCSD
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Arthur J Miller
Scripps Institution of Oceanography, Scripps Institution of Oceanography
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Sabique Langodan
KAUST, KAUST
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Ibrahim Hoteit
King Abdullah Univerity of Science and Technology, King Abdullah Univerity of Science and Technology
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Abstract

Waves generated by tropical cyclones can have devastating effects on coastal regions. However, the role of ocean currents in modifying wave amplitudes, wavelengths, and directions is commonly overlooked in wave forecasts, despite the fact that these interactions can lead to extreme wave conditions. Here, we use satellite observations and wave modeling to quantify the effects of ocean currents on the surface waves generated during a tropical cyclone event in the Arabian Sea. As a case study, this paper documents beams of wave heights originating from the eyewall of a tropical cyclone caused by current-induced refraction. Alternating regions of high and low wave heights in the model simulations are consistent with observations and extend for thousands of kilometers all the way to 100 m isobath. Our results highlight the importance of accounting for wave refraction by currents in order to accurately predict the impact of tropical cyclone generated waves on coastal regions.
Jan 2022Published in Journal of Geophysical Research: Oceans volume 127 issue 1. 10.1029/2021JC018112